Diffusion and Osmosis

Size: px
Start display at page:

Download "Diffusion and Osmosis"

Transcription

1 Diffusion and Osmosis Introduction: In this exercise you will measure diffusion of small molecules through dialysis tubing, an example of a semi permeable membrane. The movement of a solute through a semi permeable membrane is called dialysis. The size of the minute pores in the dialysis tubing determines which substance can pass through the membrane. A solution of glucose and starch will be placed inside a bag of dialysis tubing. Distilled water will be placed in a beaker, outside the dialysis bag. After 30 minutes have passed, the solution inside the dialysis tubing and the solution in the beaker will be tested for glucose and starch. The presence of reducing sugars like glucose, fructose, and sucrose will be tested with Benedict's Solution. The presence of starch will be tested with Lugol's solution (iodine-potassium-iodide). Procedure: 1. Obtain a 30 -cm piece of 2.5-cm dialysis tubing that has been soaking in water. Tie off one end of the tubing to form a bag. To open the other end of the bag, rub the end between your fingers until the edges separate. 2. Place 15 ml of the 15% glucose/ 1% starch solution in the bag. Tie off the other end of the bag, leaving sufficient space for the expansion of the bag's contents. Record the color of the solution in Table Test the 15% glucose / 1% starch solution in the bag for the presence of glucose. Your teacher may have you do a Benedict's test. Record the results in Table Fill a 250 ml beaker or cup 2/3 full with distilled water. Add approximately 4 ml of Lugol's solution to the distilled water and record the color in Table 1.1. Test the solution for glucose and record the results in Table Immerse the bag in the beaker of solution. 6. Allow your set up to stand for approximately 30 minutes or you see a distinct color change in the bag or the beaker. Record the final color of the solution in the bag, and of the solution in the beaker, in Table 1.1.

2 7. Test the liquid in the beaker and in the bag for the presence of glucose. Record the results in Table 1.1. Table 1.1 Initial Contents Initial Solution Color Final Solution Color Initial Presence of Glucose Final Presence of Glucose Bag 15% Glucose & 1% starch Beaker H 2 O + IKI Analysis of Results: 1. Which substance(s) are entering the bag and which are leaving the bag? What experimental evidence supports your answer? 2. Explain the results you obtained. Include the concentration differences and membrane pore size in your discussion. 3. Quantitative data uses numbers to measure observed changes. How could this experiment be modified so that quantitative data could be collected to show that water diffused into the dialysis bag?

3 4. Based on your observations, rank the following by relative size, beginning with the smallest : glucose molecules, water molecules, IKI molecules, membrane pores, starch molecules. 5. What results would you expect if the experiment started with glucose and IKI solution inside the bag and only starch and water outside? Why? Osmosis: In this experiment you will use dialysis tubing to investigate the relationship between solute concentration and the movement of water through a semi permeable membrane by the process of osmosis. When two solutions have the same concentration of solutes, they are said to be isotonic to each other. If the two solutions are separated by a semi permeable membrane, water will move between the two solutions, but there will be no net change in the amount of water in either solution. If two solutions differ in the concentration of solutes that each has, the one with more solute hypertonic to the one with the less solute. The solution that has less solute is hypotonic to the one with more solute. These words can only be used to compare solutions. Procedure: 1. Obtain six 30-cm strips of presoaked dialysis tubing. 2. Tie a knot in one end of each piece of dialysis tubing to form six bags. Pour approximately 25 ml of each of the following solutions into separate bags: Distilled water 0.2 M sucrose 0.4 M sucrose 0.6 M sucrose 0.8 M sucrose

4 1.0 m sucrose Remove most of the air from the bags by drawing the dialysis bag between two fingers. Tie off the other end of the bag. Leave sufficient space for the expansion of the contents in the bag. 3. Rinse each bag gently with distilled water to remove any sucrose spilled during filling. 4. Carefully blot the outside of each bag and record in Table 1.2 the initial mass of each bag. 5. Fill six 250 ml beakers 2/3 full with distilled water. 6. Immerse each bag in one of the beakers of distilled water and label the beaker to indicate the molarity of the solution in the dialysis bag. Be sure to completely submerge each bag. 7. Let them stand for 30 minutes. 8. At the end of 30 minutes remove the bags from the water. Carefully blot and determine the mass of each bag. 9. Record your group's results in Table 1.2. Obtain data from the other lab groups in your class to complete Table 1.3: Class Data. Table 1.2 Dialysis Bag Results: Individual Data Contents in Dialysis Bag Initial Mass Final Mass Mass Difference % Change in Mass a). Distilled Water b). 0.2 M c). 0.4 M d). 0.6 M e). 0.8 M f). 1.0 M To Calculate:

5 % change in mass = Final Mass-Initial Mass X Initial Mass Table 1.3 Dialysis Bag Results: Class Data percent change in Mass of Dialysis Bags Bag Contents Distilled Water 0.2 M 0.4 M 0.6 m 0.8 M 1.0 M Group 1 Group 2 Group 3 Group 4 Group 5 Group 6 Total Class Average 10. Graph the results for both your individual data and class average on the following graph. For this graph you will need to determine the following: a). the independent variable. b). the dependent variable. Graph Title

6 Analysis of Results: 1. Explain the relationship between the change in mass and the molarity of sucrose within the dialysis bag.

7 2. Predict what would happen to the mass of each bag in this experiment if all the bags were placed in a 0.4 M sucrose solution instead of distilled water. Explain your response. 3. Why did you calculate the per cent change in mass rather than using the change in mass? 4. A dialysis bag is filled with distilled water and then placed in a sucrose solution. The bag's initial mass is 20 g. and its final mass is 18 g. Calculate the percent change of mass, showing your calculations in the space below. 5. The sucrose solution in the beaker would have been to the distilled water in the bag. BACK

Diffusion and Osmosis

Diffusion and Osmosis Diffusion and Osmosis During your first year of residency at Mountainside Hospital, you are treating a group of patients that exhibit signs of dehydration. You have to be sure to take note of all the solutes

More information

DIFFUSON AND OSMOSIS INTRODUCTION diffusion concentration gradient. net osmosis water potential active transport

DIFFUSON AND OSMOSIS INTRODUCTION diffusion concentration gradient. net osmosis water potential active transport DIFFUSON AND OSMOSIS NAME DATE INTRODUCTION The life of a cell is dependent on efficiently moving material into and out of the cell across the cell membrane. Raw materials such as oxygen and sugars needed

More information

Investigating Osmosis By Amy Dewees,Jenkintown.High School and Dr. Ingrid Waldron, Department of Biology, University of Pennsylvania, 20091

Investigating Osmosis By Amy Dewees,Jenkintown.High School and Dr. Ingrid Waldron, Department of Biology, University of Pennsylvania, 20091 Investigating Osmosis By Amy Dewees,Jenkintown.High School and Dr. Ingrid Waldron, Department of Biology, University of Pennsylvania, 20091 What is diffusion? What does it mean to say that a membrane is

More information

Name: There are two things that will determine which particles will pass through and which will not:

Name: There are two things that will determine which particles will pass through and which will not: 18 Diffusion and Osmosis in Living Systems Name: Problem: How do substances move into and out of cells? Introduction: In order for cells to carry on their life processes, they must take in materials and

More information

Biology Unit 5 Cancer, Lab Activity 5-2

Biology Unit 5 Cancer, Lab Activity 5-2 Biology Unit 5 Cancer, Lab Activity 5-2 The Plasma membrane serves as a barrier between the internal cell environment and the external world. The plasma membrane is a dynamic structure. It allows some

More information

Name: Bio A.P. Lab Diffusion & Osmosis

Name: Bio A.P. Lab Diffusion & Osmosis Name: Bio A.P. Lab Diffusion & Osmosis BACKGROUND: Many aspects of the life of a cell depend on the fact that atoms and molecules are constantly in motion (kinetic energy). This kinetic energy results

More information

Name Date. In this lab investigation you will investigate the movement of water through a selectively permeable membrane.

Name Date. In this lab investigation you will investigate the movement of water through a selectively permeable membrane. This lab will be hand-written in your data book AP Osmosis Labs Part A (was done in previous a previous class: Dialysis tube + Starch + Glucose) Part B: Osmosis Unknowns In this lab investigation you will

More information

AP Lab Four: Water Potential and Osmosis

AP Lab Four: Water Potential and Osmosis AP Biology AP Lab Four: Water Potential and Osmosis Name Atoms and molecules are constantly in motion, bumping off of membranes, barriers, each other, without end. The results of this among other phenomena

More information

Diffusion across a Selectively Permeable Membrane

Diffusion across a Selectively Permeable Membrane Diffusion across a Selectively Permeable Membrane Each cell is surrounded by a selectively permeable cell membrane Cell Membrane which regulates what gets into and out of the cell. A selectively permeable

More information

Name: Date Block Selective Permeability

Name: Date Block Selective Permeability LAB Name: Date Block Selective Permeability OBJECTIVES: Observe the selective permeability of an artificial membrane. Observe diffusion of substances across an artificial membrane. Devise a model for the

More information

To understand osmosis, we must focus on the behavior of the solvent, not the solute.

To understand osmosis, we must focus on the behavior of the solvent, not the solute. GCC CHM 130LL Osmosis and Dialysis Purpose: The purpose of this experiment is to observe the closely related phenomena of osmosis and diffusion as it relates to dialysis. It is hoped that you will be able

More information

Diffusion and Osmosis

Diffusion and Osmosis Diffusion and Osmosis OBJECTIVES: 1. To explore how different molecules move by diffusion and osmosis through semi-permeable membranes. 2. To understand how concentration affects the movement of substances

More information

LAB: DIFFUSION ACROSS A SELECTIVELY PERMEABLE MEMBRANE

LAB: DIFFUSION ACROSS A SELECTIVELY PERMEABLE MEMBRANE LAB: DIFFUSION ACROSS A SELECTIVELY PERMEABLE MEMBRANE NAME: PERIOD: DATE: Building Background Knowledge: 1) SELECTIVELY PERMEABLE MEMBRANE: Every cell is surrounded by a selectively permeable membrane

More information

Research Experiences for Teachers (RET) 2012 LESSON PLAN TEMPLATE

Research Experiences for Teachers (RET) 2012 LESSON PLAN TEMPLATE LESSON PLAN TEMPLATE MODULE TOPIC: Inquiry based learning- Osmosis and Diffusion The acquisition of biochemical and life sustaining compounds is a major theme in life science. This lesson provides students

More information

Passive Transport Lab: Diffusion and Osmosis

Passive Transport Lab: Diffusion and Osmosis Name Date Period Passive Transport Lab: Diffusion and Osmosis OBJECTIVE: Apply your understanding of the processes of diffusion and osmosis to explain observational data. PART A: Starch and Iodine MATERIALS

More information

LAB: DIFFUSION ACROSS A SELECTIVELY PERMEABLE MEMBRANE

LAB: DIFFUSION ACROSS A SELECTIVELY PERMEABLE MEMBRANE LAB: DIFFUSION ACROSS A SELECTIVELY PERMEABLE MEMBRANE NAME: PERIOD: DATE: Building Background Knowledge: 1) SELECTIVELY PERMEABLE MEMBRANE: Every cell is surrounded by a selectively permeable membrane

More information

Cell Diffusion & Permeability: See-Through Eggs Student Advanced Version

Cell Diffusion & Permeability: See-Through Eggs Student Advanced Version Cell Diffusion & Permeability: See-Through Eggs Student Advanced Version In this lab, students will learn about the permeability of the cell membrane. By studying the ability of a shell-less egg to absorb

More information

Cell Diffusion & Permeability: See-Through Eggs Teacher Version

Cell Diffusion & Permeability: See-Through Eggs Teacher Version Cell Diffusion & Permeability: See-Through Eggs Teacher Version In this lab, students will learn about the permeability of the cell membrane. By studying the ability of a shell-less egg to absorb various

More information

Table of Contents Title Page Number Due Date Stamp

Table of Contents Title Page Number Due Date Stamp 1 Table of Contents Title Page Number Due Date Stamp Calendar 3 Warm - Ups 4 Carbon Based Molecules 5 02/20/2018 Notes Cell Membrane Notes 8 02/20/2018 Membrane Structure and Cell Signaling Worksheet Diffusion

More information

BIOLOGY 1101 LAB 1: OSMOSIS & DIFFUSION. READING: Please read pages & in your text prior to lab.

BIOLOGY 1101 LAB 1: OSMOSIS & DIFFUSION. READING: Please read pages & in your text prior to lab. BIOLOGY 1101 LAB 1: OSMOSIS & DIFFUSION READING: Please read pages 27-31 & 83-86 in your text prior to lab. INTRODUCTION: All living things depend on water. A water molecule is made up of an oxygen atom

More information

Safety. What You Need. What to do... Neo/SCI Student s Guide Name... Teacher/Section... Date... Step 1. Step 2

Safety. What You Need. What to do... Neo/SCI Student s Guide Name... Teacher/Section... Date... Step 1. Step 2 Diffusion & Osmosis Activity 1a Diffusion Lab 1 Background Diffusion occurs whenever concentrations of substances are not even throughout an area. This unequal distribution of particles is called a concentration

More information

Cellular Transport Worksheet

Cellular Transport Worksheet Cellular Transport Worksheet Name Section A: Cell Membrane Structure 1. Label the cell membrane diagram. You ll need to draw lines to some of the structures. **Draw cholesterol molecules in the membrane.**

More information

Name: NYS DIFFUSION LAB REVIEW Date: PACKET 1: Difusion Through a Membrane

Name: NYS DIFFUSION LAB REVIEW Date: PACKET 1: Difusion Through a Membrane Name: NYS DIFFUSION LAB REVIEW Date: PACKET 1: Difusion Through a Membrane 1. The diagram below represents a laboratory setup used to demonstrate the movement of molecules across a selectively permeable

More information

EXERCISE Transport Mechanisms in the Body

EXERCISE Transport Mechanisms in the Body EXERCISE Transport Mechanisms in the Body 2 OBJECTIVES After completing these activities, you should be able to: Understand the differences between passive and active processes of transport Define diffusion,

More information

LAB 04 Diffusion and Osmosis

LAB 04 Diffusion and Osmosis LAB 04 Diffusion and Osmosis Objectives: Describe the physical mechanisms of diffusion and osmosis. Understand the relationship between surface area and rate of diffusion. Describe how molar concentration

More information

Osmosis and Diffusion: How biological membranes are important This page is a lab preparation guide for instructors.

Osmosis and Diffusion: How biological membranes are important This page is a lab preparation guide for instructors. Osmosis and Diffusion: How biological membranes are important This page is a lab preparation guide for instructors. **All solutions and dialysis bags can easily be prepared prior to lab start to maximize

More information

Cell Membranes: Diffusion and Osmosis

Cell Membranes: Diffusion and Osmosis STO-112 Cell Membranes: Diffusion and Osmosis Part 1: Diffusion Diffusion is a process by which molecules move into or out of cells. To diffuse into or out of a cell, molecules must pass through the cell

More information

250-mL beakers. iodine solution metric ruler. 10-mL graduated cylinders pipettes. (Read the Procedure first to answer the Questions)

250-mL beakers. iodine solution metric ruler. 10-mL graduated cylinders pipettes. (Read the Procedure first to answer the Questions) Detecting Diffusion Introduction A cell membrane is a selectively permeable barrier. Some particles can pass through the cell membrane while other particles are held back. Solutes that can move across

More information

Diffusion, Osmosis and Active Transport

Diffusion, Osmosis and Active Transport Diffusion, Osmosis and Active Transport Part A: Diffusion A living cell interacts constantly with the environmental medium that surrounds it. The plasma membrane surrounding a cell is a living, selectively

More information

Chapter MEMBRANE TRANSPORT

Chapter MEMBRANE TRANSPORT Chapter 3 I MEMBRANE TRANSPORT The cell membrane, or plasma membrane, is the outermost layer of the cell. It completely surrounds the protoplasm or living portion of the cell, separating the cell s interior

More information

Quotes from Next Generation Science Standards, available at

Quotes from Next Generation Science Standards, available at Teacher Preparation Notes for Diffusion across a Selectively Permeable Membrane Drs. Jennifer Doherty and Ingrid Waldron, Department of Biology, University of Pennsylvania, 2015 1 Students investigate

More information

AP Biology Lab 1c Water Potential

AP Biology Lab 1c Water Potential Page 1 of 9 AP Biology Lab 1c Water Potential In this part of the exercise you will use potato cores placed in different molar concentrations of sucrose in order to determine the water potential of potato

More information

David Huang! AP Biology! Oct. 4,2013! AP Biology Osmosis Laboratory Analysis! Introduction:!! There are several different methods for the

David Huang! AP Biology! Oct. 4,2013! AP Biology Osmosis Laboratory Analysis! Introduction:!! There are several different methods for the David Huang AP Biology Oct. 4,2013 AP Biology Osmosis Laboratory Analysis Introduction: There are several different methods for the transportation of molecules across the phospholipid bilayer. These transportation

More information

1. How many fatty acid molecules combine with a glycerol to form a phospholipid molecule? A. 1 B. 2 C. 3 D. 4

1. How many fatty acid molecules combine with a glycerol to form a phospholipid molecule? A. 1 B. 2 C. 3 D. 4 Topic 3: Movement of substances across cell membrane 1. How many fatty acid molecules combine with a glycerol to form a phospholipid molecule? A. 1 B. 2 C. 3 D. 4 Directions: Questions 2 and 3 refer to

More information

Lab 4: Osmosis and Diffusion

Lab 4: Osmosis and Diffusion Page 4.1 Lab 4: Osmosis and Diffusion Cells need to obtain water and other particles from the fluids that surround them. Water and other particles also move out of cells. Osmosis (for water) and diffusion

More information

Osmosis. Evaluation copy

Osmosis. Evaluation copy Osmosis Computer 1B In order to survive, all organisms need to move molecules in and out of their cells. Molecules such as gases (e.g., O 2, CO 2 ), water, food, and wastes pass across the cell membrane.

More information

Lab #2: Osmosis Pre-Lab Exercise

Lab #2: Osmosis Pre-Lab Exercise Lab #2: Osmosis Pre-Lab Exercise Name 1. Using your own words, define the following terms: a. Osmosis b. Concentration gradient: c. Hypertonic solution: d. Isotonic solution: e. Hypotonic solution: 2.

More information

Agar Lab. Sophie, Regan, Libby

Agar Lab. Sophie, Regan, Libby Agar Lab Sophie, Regan, Libby Agar Lab: Our Data Independent variable: Width of the agar Levels of IV Dependent variable: Time it takes for NaOH to diffuse (seconds) 2mm, 4mm, and 8mm # of trials 3 constants

More information

Introduction diffusion osmosis. imbibe Diffusion The Cell Membrane and Osmosis selectively permeable membrane Osmosis 1. Isotonic 2.

Introduction diffusion osmosis. imbibe Diffusion The Cell Membrane and Osmosis selectively permeable membrane Osmosis 1. Isotonic 2. Topic 6. Diffusion Introduction: This exercise explores the physical phenomenon of diffusion and osmosis. Osmosis is simply the diffusion of water through a selectively permeable membrane. We will also

More information

Learning Outcomes. 2. Diffusion takes place through the cell membrane because it is selectively permeable.

Learning Outcomes. 2. Diffusion takes place through the cell membrane because it is selectively permeable. Diffusion Learning Outcomes 1. Diffusion is the movement of molecules from a high concentration to a low concentration down a concentration gradient until evenly spread. 2. Diffusion takes place through

More information

Topic 3: Movement of substances across cell membrane

Topic 3: Movement of substances across cell membrane Topic 3: Movement of substances across cell membrane 1. What is/are the role(s) of structure A? (1) For cell recognition. (2) For carrying water-soluble substances across cell membrane. (3) For supporting

More information

Biology Cell Unit Homework Packet #3

Biology Cell Unit Homework Packet #3 Biology Cell Unit Homework Packet #3 Name DUE: Hour HW #5 Egg Demo Drawings Analysis HW #6 Elodea Drawings lab Analysis HW #7 Cell Questions Membrane and Transport HW #8 Questions / 5 possible points Homework

More information

INTERNATIONAL TURKISH HOPE SCHOOL ACADEMIC YEAR CHITTAGONG SENIOR SECTION BIOLOGY HANDOUT OSMOSIS, DIFFUSION AND ACTIVE TRANSPORT CLASS 9

INTERNATIONAL TURKISH HOPE SCHOOL ACADEMIC YEAR CHITTAGONG SENIOR SECTION BIOLOGY HANDOUT OSMOSIS, DIFFUSION AND ACTIVE TRANSPORT CLASS 9 INTERNATIONAL TURKISH HOPE SCHOOL 2014 2015 ACADEMIC YEAR CHITTAGONG SENIOR SECTION BIOLOGY HANDOUT OSMOSIS, DIFFUSION AND ACTIVE TRANSPORT CLASS 9 Name :... Date:... d) Movement of substances into and

More information

LAB 4: OSMOSIS AND DIFFUSION

LAB 4: OSMOSIS AND DIFFUSION Page 4.1 LAB 4: OSMOSIS AND DIFFUSION Cells need to obtain water and other particles from the fluids that surround them. Water and other particles also move out of cells. Osmosis (for water) and diffusion

More information

Investigation 4: Diffusion and Osmosis Notes From the teacher

Investigation 4: Diffusion and Osmosis Notes From the teacher Day 1: Investigation 4: Diffusion and Osmosis Notes From the teacher Before class: Read Learning Objectives through Procedure 1 and complete Day 1 Pre Lab. Pre-Lab: 1. What is diffusion? 2. What is kinetic

More information

LAB Potato Cores Honors Biology, Newton North High

LAB Potato Cores Honors Biology, Newton North High Name Date Block LAB Potato Cores Honors Biology, Newton North High BACKGROUND: Osmosis is a type of passive transport. No input of energy is needed in order for water to pass through a selectively permeable

More information

Passive Transport: Practice Problems PAP BIOLOGY

Passive Transport: Practice Problems PAP BIOLOGY Passive Transport: Practice Problems PAP BIOLOGY #1 Draw a diagram where the cell has low concentration of salt molecules and the environment it is in has a high concentration of salt molecules in a water

More information

Measuring Osmotic Potential

Measuring Osmotic Potential Measuring Osmotic Potential INTRODUCTION All cells require essential materials to ensure their survival. Chemical, physical, and biological processes are used to move these materials inside of cells. Similar

More information

INVESTIGATION : Determining Osmolarity of Plant Tissue

INVESTIGATION : Determining Osmolarity of Plant Tissue INVESTIGATION : Determining Osmolarity of Plant Tissue AP Biology This lab investigation has two main components. In the first component, you will learn about the osmolarity of plant tissues and the property

More information

Distilled Water Balance Ruler Plastic wrap

Distilled Water Balance Ruler Plastic wrap The following lab taken from: http://www.utsouthwestern.edu/edumedia/edufiles/education_training/programs/stars/osmosis-demo-lab.pdf Background Osmosis is the process whereby water moves across a cell

More information

Biology Cell Unit Homework Packet #3

Biology Cell Unit Homework Packet #3 Biology Cell Unit Homework Packet #3 Name DUE: Hour HW #5 Egg Demo Drawings Analysis HW #6 Elodea Drawings lab Analysis HW #7 Cell Questions Membrane and Transport HW #8 Questions / 5 possible points Homework

More information

AGENDA for 01/09/14 AGENDA: HOMEWORK: Due end of period OBJECTIVES:

AGENDA for 01/09/14 AGENDA: HOMEWORK: Due end of period OBJECTIVES: AGENDA for 01/09/14 AGENDA: 1. 2.3.2: Diabetic Emergency! Blood Glucose Effects on Simulated Cellular Models Egg Demo Day 3 OBJECTIVES: 1. Design an experiment to simulate osmosis in body cells 2. Relate

More information

Observing Osmosis Lab

Observing Osmosis Lab Observing Osmosis Lab Background Information: Molecules are in constant motion, and tend to move from areas of higher concentrations to areas of lower concentrations. Diffusion is defined as the movement

More information

Cell Diffusion and Osmosis Lab: Directions

Cell Diffusion and Osmosis Lab: Directions Cell Diffusion and Osmosis Lab: Directions Adapted from AP bio lab 4 http://media.collegeboard.com/digitalservices/pdf/ap/bio-manual/bio_lab4-diffusionandosmosis.pdf Please return Background: Most cells

More information

1. All cells have a that acts as a between the outside and inside of the cell.

1. All cells have a that acts as a between the outside and inside of the cell. https://www.youtube.com/watch?v=cnbzdcibegy 1. All cells have a that acts as a between the outside and inside of the cell. 1 2. Cell membranes are primarily made of which are large molecules. 3. It is

More information

GCSE. Biology Practical Manual. Unit 3: Practical Skills CCEA GCSE TEACHER GUIDANCE. 2.1 Investigate the process of osmosis

GCSE. Biology Practical Manual. Unit 3: Practical Skills CCEA GCSE TEACHER GUIDANCE. 2.1 Investigate the process of osmosis GCSE CCEA GCSE TEACHER GUIDANCE Biology Practical Manual Unit 3: Practical Skills 2.1 Investigate the process of osmosis For first teaching from September 2017 Practical 2.1 Investigate the process of

More information

Experimental Design and Investigating Diffusion and Osmosis

Experimental Design and Investigating Diffusion and Osmosis Bio 101 Name: Experimental Design and Investigating Diffusion and Osmosis OBJECTIVES: To practice applying hypothesis testing. To further your understanding of experimental design. To gain a better understanding

More information

Big. Cellular Processes: Idea. Energy and Communication DIFFUSION AND OSMOSIS. What causes my plants to wilt if I forget to water them?

Big. Cellular Processes: Idea. Energy and Communication DIFFUSION AND OSMOSIS. What causes my plants to wilt if I forget to water them? Big Cellular Processes: Idea 2 Energy and Communication INVESTIGATION 4 DIFFUSION AND OSMOSIS What causes my plants to wilt if I forget to water them? BACKGROUND Cells must move materials through membranes

More information

Principles & Practice of Diffusion & Osmosis. Storage: Store entire experiment at room temperature. EXPERIMENT OBJECTIVE

Principles & Practice of Diffusion & Osmosis. Storage: Store entire experiment at room temperature. EXPERIMENT OBJECTIVE The Biotechnology Education Company Storage: Store entire experiment at room temperature. 281 EDVO-Kit # Principles & Practice of Diffusion & Osmosis EXPERIMENT OBJECTIVE The objective of this experiment

More information

Osmosis Practice Problems. Good practice for test-taking strategy, too.

Osmosis Practice Problems. Good practice for test-taking strategy, too. Osmosis Practice Problems Good practice for test-taking strategy, too. #1 If you soak your hands in dishwater, you may notice that your skin absorbs water and swells into wrinkles. This is because your

More information

Biology Movement Across the Cell Membrane

Biology Movement Across the Cell Membrane Biology 160 - Movement Across the Cell Membrane Prelab Information Movement is one of the characteristics of life. The ability to control the movement of material across the cell membrane is an incredibly

More information

The Role of the Cell Membrane in Transport

The Role of the Cell Membrane in Transport The Role of the Cell Membrane in Transport diffusion: the spontaneous movement of particles from an area of higher concentration to an area of lower concentration Many people, young and old, enjoy a nice

More information

Osmosis. Computer OBJECTIVES

Osmosis. Computer OBJECTIVES Osmosis Computer 22 In order to survive, all organisms need to move molecules in and out of their cells. Molecules such as gases (e.g., O 2, CO 2 ), water, food, and wastes pass across the cell membrane.

More information

Biology Movement across the Cell Membrane

Biology Movement across the Cell Membrane Biology 160 - Movement across the Cell Membrane Prelab Information Movement is one of the characteristics of life. The ability to control the movement of material across the cell membrane is an incredibly

More information

Diffusion & Osmosis - Exercise 4

Diffusion & Osmosis - Exercise 4 Diffusion & Osmosis - Exercise 4 Objectives -Define: Solvent, Solute, and Solution -Define: Diffusion, Selectively permeable membrane, Osmosis, and Dialysis -Understand rule of thumb: Concentration will

More information

Identification of Organic Compounds Lab

Identification of Organic Compounds Lab Identification of Organic Compounds Lab Introduction All organic compounds contain the element carbon (C). Organic compounds usually also contain oxygen (O) or hydrogen (H) or both. They may also contain

More information

LAB #3 - DIFFUSION AND OSMOSIS

LAB #3 - DIFFUSION AND OSMOSIS DIFFUSION EXPERIMENT - pg. 4-6 LAB #3 - DIFFUSION AND OSMOSIS Definition of DIFFUSION - The natural tendency of particles to move from areas of high concentration to areas of lower concentration START

More information

Egg-speriment (Osmosis Lab) 2009

Egg-speriment (Osmosis Lab) 2009 Purpose/Objectives: Osmosis can have important consequences for the cell. The purpose of this lab is to study the effects of osmosis on a cell that is submerged in different aqueous environments: vinegar,

More information

DIFFUSION AND OSMOSIS

DIFFUSION AND OSMOSIS Lab 5 DIFFUSION AND OSMOSIS OBJECTIVES Describe the process of diffusion at the molecular level; State the physical factors that determine the direction and rate of diffusion; Discuss why diffusion rates,

More information

An Experimental Approach to the Effect of Fluids Tonicity on Osmosis Using Molasses, Corn Syrup and Pancake Syrup

An Experimental Approach to the Effect of Fluids Tonicity on Osmosis Using Molasses, Corn Syrup and Pancake Syrup An Experimental Approach to the Effect of Fluids Tonicity on Osmosis Using Molasses, Corn Syrup and Pancake Syrup Spring 2019 By Franklin S Carman III, Ph.D., Professor of Biophysical Sciences Carson City

More information

Lab #6: Cellular Transport Mechanisms Lab

Lab #6: Cellular Transport Mechanisms Lab Lab #6: Cellular Transport Mechanisms Lab OVERVIEW One of the major functions of the plasma membrane is to regulate the movement of substances into and out of the cell. This process is essential in maintaining

More information

What is the function of the cell membrane?

What is the function of the cell membrane? What is the function of the cell membrane? 1. DIFFUSION: The movement of molecules from an area of high concentration to an area of lower concentration. Why do molecules move from high concentration to

More information

Equilibrium is a condition of balance. Changes in temperature, pressure or concentration can cause a shift in the equilibrium.

Equilibrium is a condition of balance. Changes in temperature, pressure or concentration can cause a shift in the equilibrium. Copy into Note Packet and Return to Teacher Cells and Their Environment Section 1: Passive Transport Objectives Relate concentration gradients, diffusion, and equilibrium. Predict the direction of water

More information

Text Reference, Campbell v.8, Chapter 7 CELL TRANSPORT MEMBRANE PROPERTIES PASSIVE TRANSPORT CHARACTERISTICS: DIFFUSION:

Text Reference, Campbell v.8, Chapter 7 CELL TRANSPORT MEMBRANE PROPERTIES PASSIVE TRANSPORT CHARACTERISTICS: DIFFUSION: AP BIOLOGY Text Reference, Campbell v.8, Chapter 7 ACTIVITY 1.14 NAME DATE HOUR CELL TRANSPORT MEMBRANE PROPERTIES PASSIVE TRANSPORT CHARACTERISTICS: DIFFUSION: OSMOSIS: ISOTONIC HYPOTONIC HYPERTONIC ANIMAL

More information

Diffusion, osmosis, transport mechanisms 43

Diffusion, osmosis, transport mechanisms 43 Diffusion, osmosis, transport mechanisms 43 DIFFUSION, OSMOSIS AND TRANSPORT MECHANISMS The cell membrane is a biological membrane that separates the interior of all cells from the outside environment

More information

Cells & Transport. Chapter 7.1, 7.2, & 7.4

Cells & Transport. Chapter 7.1, 7.2, & 7.4 Cells & Transport Chapter 7.1, 7.2, & 7.4 Do Now How big is a cell? How many cells are we made of? How many cells is the smallest living organism made of? Objectives Describe how cells were discovered

More information

The Cell Membrane. Also known as the Plasma Membrane

The Cell Membrane. Also known as the Plasma Membrane Student Objectives Know the different parts of the cell membrane Understand the role of the cell membrane in cellular transport Understand diffusion and osmosis Determine what will happen to plant and

More information

4. Explain why phospholipids will spontaneously form a membrane when placed in an aquatic solution.

4. Explain why phospholipids will spontaneously form a membrane when placed in an aquatic solution. Homeostasis Stations Use the information provided around the room to complete this packet. STATION 1: Cell membrane LT: I can explain how the major organelles interact as a system to maintain cellular

More information

Whitehall Memorial High School Whitehall, WI. Starches. By Scott McConnell High School Life Science Instructor And by Delaine Stendahl

Whitehall Memorial High School Whitehall, WI. Starches. By Scott McConnell High School Life Science Instructor And by Delaine Stendahl Whitehall Memorial High School Whitehall, WI Starches By Scott McConnell High School Life Science Instructor And by Delaine Stendahl What is a starch? According to Webster s Dictionary: an odorless tasteless

More information

Passive Transport. Does not expend cellular energy for the movement to take place. Ex-rolling down a hill

Passive Transport. Does not expend cellular energy for the movement to take place. Ex-rolling down a hill Passive Transport Fluid Mosaic Model Passive Transport Does not expend cellular energy for the movement to take place Ex-rolling down a hill Parts of a Solution Solute: what gets dissolved Solvent: What

More information

Chapter 3.4 & 3.5 Cell Transport (Osmosis and Diffusion) = only some molecules can get in or out of the cell

Chapter 3.4 & 3.5 Cell Transport (Osmosis and Diffusion) = only some molecules can get in or out of the cell Chapter 3.4 & 3.5 Cell Transport (Osmosis and Diffusion) I. Cell Membrane (cells need an inside and outside) a. separate cell from its environment b. cell membrane is the boundary c. cell membrane controls

More information

Unit 3: Cellular Processes. 1. SEPARTION & PROTECTION: the contents of the cell from the. 2. TRANSPORT: the transport of in and out of the cell

Unit 3: Cellular Processes. 1. SEPARTION & PROTECTION: the contents of the cell from the. 2. TRANSPORT: the transport of in and out of the cell Unit 3: Cellular Processes Name: Aim #14 Cell Membrane: How does the cell membrane function to maintain homeostasis? Date: _ I. The Cell Membrane: What is it? Also known as A thin structure that acts as

More information

STATION 4: TONICITY due to OSMOSIS / Turgor Pressure in Plants

STATION 4: TONICITY due to OSMOSIS / Turgor Pressure in Plants STATION 4: TONICITY due to OSMOSIS / Turgor Pressure in Plants Tonicity is the concentration of solutions that determines the direction water will move across a semi-permeable membrane. A solution is a

More information

Membranes & Enzymes. Practice Questions. Slide 1 / 91. Slide 2 / 91. Slide 3 / 91

Membranes & Enzymes. Practice Questions. Slide 1 / 91. Slide 2 / 91. Slide 3 / 91 New Jersey Center for Teaching and Learning Slide 1 / 91 Progressive Science Initiative This material is made freely available at www.njctl.org and is intended for the non-commercial use of students and

More information

VANDERBILT STUDENT VOLUNTEERS FOR SCIENCE

VANDERBILT STUDENT VOLUNTEERS FOR SCIENCE VANDERBILT TUDENT VOLUNTEER FOR CIENCE http://studentorgs.vanderbilt.edu/vsvs Diffusion Fall 2018 oal: To understand diffusion, the process in which there is movement of a substance from an area of high

More information

Osmosis in Potato Slices

Osmosis in Potato Slices Osmosis in Potato Slices Vanderbilt Student Volunteers for Science Training Presentation 2018-2019 VINSE/VSVS Rural Important! Please use this resource to reinforce your understanding of the lesson! Make

More information

Movement of substances across the cell membrane

Movement of substances across the cell membrane Ch 4 Movement of substances across the cell membrane Think about (Ch 4, p.2) 1. The structure of the cell membrane can be explained by the fluid mosaic model. It describes that the cell membrane is mainly

More information

Diffusion and Osmosis Lab AP LAB 4

Diffusion and Osmosis Lab AP LAB 4 Diffusion and Osmosis Lab AP LAB 4 Part 1: Surface Area and Cell Size Which do you think has a greater influence on the rate of diffusion in a cell surface area or volume? You will calculate surface are-to-volume

More information

CELL MEMBRANE & CELL TRANSPORT (PASSIVE and ACTIVE) Webquest

CELL MEMBRANE & CELL TRANSPORT (PASSIVE and ACTIVE) Webquest Name: Period: CELL MEMBRANE & CELL TRANSPORT (PASSIVE and ACTIVE) Webquest PART I: CELL MEMBRANES WEBSITE #1: http://www.wisc-online.com/objects/index_tj.asp?objid=ap1101 1. What is the BASIC UNIT of LIFE?

More information

Section 4: Cellular Transport. Cellular transport moves substances within the cell and moves substances into and out of the cell.

Section 4: Cellular Transport. Cellular transport moves substances within the cell and moves substances into and out of the cell. Section 4: Cellular transport moves substances within the cell and moves substances into and out of the cell. Essential Questions What are the processes of diffusion, facilitated diffusion, and active

More information

Lab: Organic Compounds

Lab: Organic Compounds Lab: Organic Compounds Name(s) Date Period Benchmark: SC.912.L.18.1: Describe the basic molecular structures and primary functions of the four major categories of biological macromolecules. Background:

More information

Science Biology Unit 04 Exemplar Lesson 02: Homeostasis and Membrane Transport

Science Biology Unit 04 Exemplar Lesson 02: Homeostasis and Membrane Transport Science Unit 04 Exemplar Lesson 02: Homeostasis and Membrane Transport Science Unit: 04 Lesson: 02 Suggested Duration: 7 days This lesson is one approach to teaching the State Standards associated with

More information

Cell Membrane (Transport) Notes

Cell Membrane (Transport) Notes Cell Membrane (Transport) Notes Cell Membrane and Cell Wall: ALL cells have a cell membrane made of proteins and lipids protein channel Cell Membrane Layer 1 Layer 2 lipid bilayer protein pump SOME cells

More information

3. What is used to test for the presence of simple reducing sugars such as monosaccharides?

3. What is used to test for the presence of simple reducing sugars such as monosaccharides? Lab 7-1 Analysis and s 1. What is used to test for the presence of starch? 2. How can you tell by using this test that a substance contains starch? 3. What is used to test for the presence of simple reducing

More information

In groups of 3, half the class will conduct factors affecting diffusion lab while the others are working on osmosis

In groups of 3, half the class will conduct factors affecting diffusion lab while the others are working on osmosis Factors Affecting Diffusion & Osmosis In groups of 3, half the class will conduct factors affecting diffusion lab while the others are working on osmosis 1 THE CELL IN ACTION! 2 Passive Transport The net

More information

BIO 12 UNIT 04: The Cell Membrane BCLN Rev. July, 2015

BIO 12 UNIT 04: The Cell Membrane BCLN Rev. July, 2015 Project 1: Osmosis Lab Name: Potential Credits: /50 Project Goals: to gain and demonstrate a better understanding of osmosis Instructions Please read through the Unit 4 Lessons, paying particular attention

More information

Name : ( ) 4551/3 SMJK PEREMPUAN CHINA PULAU PINANG TRIAL EXAM 2012 BIOLOGY PAPER 3 1 HOUR 30 MINUTES DO NOT OPEN THIS BOOKLET UNTIL INSTRUCTED

Name : ( ) 4551/3 SMJK PEREMPUAN CHINA PULAU PINANG TRIAL EXAM 2012 BIOLOGY PAPER 3 1 HOUR 30 MINUTES DO NOT OPEN THIS BOOKLET UNTIL INSTRUCTED Name : ( ) 4551/3 Class : S5 BIOLOGY Paper 3 September 2012 1 ½ hours SMJK PEREMPUAN CHINA PULAU PINANG TRIAL EXAM 2012 BIOLOGY PAPER 3 1 HOUR 30 MINUTES DO NOT OPEN THIS BOOKLET UNTIL INSTRUCTED 1. This

More information

Name: Teacher: Ms. Petrakos. Lesson #21 - Cell Transport Diffusion Review

Name: Teacher: Ms. Petrakos. Lesson #21 - Cell Transport Diffusion Review Name: Teacher: Ms. Petrakos Lesson #21 - Cell Transport Diffusion Review Figure 1 Base your answer to the question on the diagram below and on your knowledge of biology. The diagram represents an experimental

More information